import { login, logout } from '@/api/login'
import { teacherInfo } from '@/api/teacher.js'
import { getToken, setToken, removeToken } from '@/utils/auth'
import router, {
	resetRouter
} from '@/router'

const state = {
	token: getToken(),
	roles: []
}

const mutations = {
	SET_TOKEN: (state, token) => {
		state.token = token
	},
	SET_ROLES: (state, roles) => {
		state.roles = roles
	}
}

const actions = {
	// user login
	login({
		commit
	}, userInfo) {
		return new Promise((resolve, reject) => {
			login(userInfo).then(response => {
				if(response.code == '200') {
					const {
						data
					} = response
					commit('SET_TOKEN', data)
					setToken(data)
				}
				resolve(response)
			}).catch(error => {
				reject(error)
			})
		})
	},

	// get user info
	getInfo({
		commit,
		state
	}) {
		return new Promise((resolve, reject) => {
			teacherInfo().then(response => {
				if(response.code == 200) {
					commit('SET_ROLES', response.data.authorities)
					resolve(response.data)
				} else {
					reject(response.data)
				}
			}).catch(error => {
				reject(error)
			})
		})
	},

	// user logout
	logout({
		commit,
		state
	}) {
		return new Promise((resolve, reject) => {
			// state.token
			logout(state.token).then(() => {
				commit('SET_TOKEN', '')
				commit('SET_ROLES', [])
				removeToken()
				resetRouter()
				resolve()
			}).catch(error => {
				reject(error)
			})
		})
	},

	// remove token
	resetToken({
		commit
	}) {
		return new Promise(resolve => {
			commit('SET_TOKEN', '')
			commit('SET_ROLES', [])
			removeToken()
			resolve()
		})
	},

	// dynamically modify permissions
	changeRoles({
		commit,
		dispatch
	}, role) {
		return new Promise(async resolve => {
			const token = role + '-token'

			commit('SET_TOKEN', token)
			setToken(token)

			const {
				roles
			} = await dispatch('getInfo')

			resetRouter()

			// generate accessible routes map based on roles
			const accessRoutes = await dispatch('permission/generateRoutes', roles, {
				root: true
			})

			// dynamically add accessible routes
			router.addRoutes(accessRoutes)

			// reset visited views and cached views
			dispatch('tagsView/delAllViews', null, {
				root: true
			})

			resolve()
		})
	}
}

export default {
	namespaced: true,
	state,
	mutations,
	actions
}